2292 lines
63 KiB
C
2292 lines
63 KiB
C
#ifndef STRINGBUF_H
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#define STRINGBUF_H
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/* (c) 2017 Workware Systems Pty Ltd -- All Rights Reserved */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** @file
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* A stringbuf is a resizing, null terminated string buffer.
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*
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* The buffer is reallocated as necessary.
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*
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* In general it is *not* OK to call these functions with a NULL pointer
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* unless stated otherwise.
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*
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* If USE_UTF8 is defined, supports utf8.
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*/
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/**
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* The stringbuf structure should not be accessed directly.
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* Use the functions below.
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*/
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typedef struct {
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int remaining; /**< Allocated, but unused space */
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int last; /**< Index of the null terminator (and thus the length of the string) */
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#ifdef USE_UTF8
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int chars; /**< Count of characters */
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#endif
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char *data; /**< Allocated memory containing the string or NULL for empty */
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} stringbuf;
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/**
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* Allocates and returns a new stringbuf with no elements.
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*/
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stringbuf *sb_alloc(void);
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/**
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* Frees a stringbuf.
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* It is OK to call this with NULL.
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*/
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void sb_free(stringbuf *sb);
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/**
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* Returns an allocated copy of the stringbuf
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*/
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stringbuf *sb_copy(stringbuf *sb);
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/**
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* Returns the length of the buffer.
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*
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* Returns 0 for both a NULL buffer and an empty buffer.
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*/
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static inline int sb_len(stringbuf *sb) {
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return sb->last;
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}
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/**
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* Returns the utf8 character length of the buffer.
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*
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* Returns 0 for both a NULL buffer and an empty buffer.
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*/
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static inline int sb_chars(stringbuf *sb) {
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#ifdef USE_UTF8
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return sb->chars;
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#else
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return sb->last;
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#endif
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}
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/**
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* Appends a null terminated string to the stringbuf
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*/
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void sb_append(stringbuf *sb, const char *str);
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/**
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* Like sb_append() except does not require a null terminated string.
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* The length of 'str' is given as 'len'
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*
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* Note that in utf8 mode, characters will *not* be counted correctly
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* if a partial utf8 sequence is added with sb_append_len()
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*/
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void sb_append_len(stringbuf *sb, const char *str, int len);
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/**
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* Returns a pointer to the null terminated string in the buffer.
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*
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* Note this pointer only remains valid until the next modification to the
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* string buffer.
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*
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* The returned pointer can be used to update the buffer in-place
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* as long as care is taken to not overwrite the end of the buffer.
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*/
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static inline char *sb_str(const stringbuf *sb)
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{
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return sb->data;
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}
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/**
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* Inserts the given string *before* (zero-based) 'index' in the stringbuf.
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* If index is past the end of the buffer, the string is appended,
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* just like sb_append()
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*/
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void sb_insert(stringbuf *sb, int index, const char *str);
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/**
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* Delete 'len' bytes in the string at the given index.
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*
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* Any bytes past the end of the buffer are ignored.
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* The buffer remains null terminated.
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*
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* If len is -1, deletes to the end of the buffer.
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*/
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void sb_delete(stringbuf *sb, int index, int len);
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/**
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* Clear to an empty buffer.
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*/
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void sb_clear(stringbuf *sb);
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/**
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* Return an allocated copy of buffer and frees 'sb'.
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*
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* If 'sb' is empty, returns an allocated copy of "".
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*/
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char *sb_to_string(stringbuf *sb);
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#ifdef __cplusplus
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}
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#endif
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <assert.h>
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#ifndef STRINGBUF_H
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#include "stringbuf.h"
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#endif
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#ifdef USE_UTF8
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#include "utf8.h"
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#endif
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#define SB_INCREMENT 200
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stringbuf *sb_alloc(void)
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{
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stringbuf *sb = (stringbuf *)malloc(sizeof(*sb));
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sb->remaining = 0;
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sb->last = 0;
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#ifdef USE_UTF8
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sb->chars = 0;
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#endif
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sb->data = NULL;
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return(sb);
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}
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void sb_free(stringbuf *sb)
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{
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if (sb) {
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free(sb->data);
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}
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free(sb);
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}
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void sb_realloc(stringbuf *sb, int newlen)
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{
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sb->data = (char *)realloc(sb->data, newlen);
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sb->remaining = newlen - sb->last;
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}
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void sb_append(stringbuf *sb, const char *str)
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{
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sb_append_len(sb, str, strlen(str));
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}
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void sb_append_len(stringbuf *sb, const char *str, int len)
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{
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if (sb->remaining < len + 1) {
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sb_realloc(sb, sb->last + len + 1 + SB_INCREMENT);
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}
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memcpy(sb->data + sb->last, str, len);
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sb->data[sb->last + len] = 0;
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sb->last += len;
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sb->remaining -= len;
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#ifdef USE_UTF8
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sb->chars += utf8_strlen(str, len);
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#endif
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}
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char *sb_to_string(stringbuf *sb)
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{
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if (sb->data == NULL) {
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/* Return an allocated empty string, not null */
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return strdup("");
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}
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else {
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/* Just return the data and free the stringbuf structure */
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char *pt = sb->data;
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free(sb);
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return pt;
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}
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}
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/* Insert and delete operations */
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/* Moves up all the data at position 'pos' and beyond by 'len' bytes
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* to make room for new data
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*
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* Note: Does *not* update sb->chars
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*/
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static void sb_insert_space(stringbuf *sb, int pos, int len)
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{
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assert(pos <= sb->last);
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/* Make sure there is enough space */
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if (sb->remaining < len) {
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sb_realloc(sb, sb->last + len + SB_INCREMENT);
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}
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/* Now move it up */
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memmove(sb->data + pos + len, sb->data + pos, sb->last - pos);
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sb->last += len;
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sb->remaining -= len;
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/* And null terminate */
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sb->data[sb->last] = 0;
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}
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/**
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* Move down all the data from pos + len, effectively
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* deleting the data at position 'pos' of length 'len'
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*/
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static void sb_delete_space(stringbuf *sb, int pos, int len)
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{
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assert(pos < sb->last);
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assert(pos + len <= sb->last);
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#ifdef USE_UTF8
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sb->chars -= utf8_strlen(sb->data + pos, len);
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#endif
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/* Now move it up */
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memmove(sb->data + pos, sb->data + pos + len, sb->last - pos - len);
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sb->last -= len;
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sb->remaining += len;
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/* And null terminate */
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sb->data[sb->last] = 0;
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}
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void sb_insert(stringbuf *sb, int index, const char *str)
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{
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if (index >= sb->last) {
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/* Inserting after the end of the list appends. */
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sb_append(sb, str);
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}
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else {
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int len = strlen(str);
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sb_insert_space(sb, index, len);
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memcpy(sb->data + index, str, len);
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#ifdef USE_UTF8
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sb->chars += utf8_strlen(str, len);
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#endif
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}
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}
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/**
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* Delete the bytes at index 'index' for length 'len'
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* Has no effect if the index is past the end of the list.
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*/
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void sb_delete(stringbuf *sb, int index, int len)
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{
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if (index < sb->last) {
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char *pos = sb->data + index;
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if (len < 0) {
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len = sb->last;
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}
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sb_delete_space(sb, pos - sb->data, len);
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}
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}
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void sb_clear(stringbuf *sb)
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{
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if (sb->data) {
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/* Null terminate */
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sb->data[0] = 0;
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sb->last = 0;
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#ifdef USE_UTF8
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sb->chars = 0;
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#endif
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}
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}
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/* linenoise.c -- guerrilla line editing library against the idea that a
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* line editing lib needs to be 20,000 lines of C code.
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*
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* You can find the latest source code at:
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*
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* http://github.com/msteveb/linenoise
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* (forked from http://github.com/antirez/linenoise)
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*
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* Does a number of crazy assumptions that happen to be true in 99.9999% of
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* the 2010 UNIX computers around.
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*
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* ------------------------------------------------------------------------
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*
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* Copyright (c) 2010, Salvatore Sanfilippo <antirez at gmail dot com>
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* Copyright (c) 2010, Pieter Noordhuis <pcnoordhuis at gmail dot com>
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* Copyright (c) 2011, Steve Bennett <steveb at workware dot net dot au>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ------------------------------------------------------------------------
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*
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* References:
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* - http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
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* - http://www.3waylabs.com/nw/WWW/products/wizcon/vt220.html
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*
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* Bloat:
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* - Completion?
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*
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* Unix/termios
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* ------------
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* List of escape sequences used by this program, we do everything just
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* a few sequences. In order to be so cheap we may have some
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* flickering effect with some slow terminal, but the lesser sequences
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* the more compatible.
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*
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* EL (Erase Line)
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* Sequence: ESC [ 0 K
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* Effect: clear from cursor to end of line
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*
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* CUF (CUrsor Forward)
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* Sequence: ESC [ n C
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* Effect: moves cursor forward n chars
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*
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* CR (Carriage Return)
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* Sequence: \r
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* Effect: moves cursor to column 1
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*
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* The following are used to clear the screen: ESC [ H ESC [ 2 J
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* This is actually composed of two sequences:
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*
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* cursorhome
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* Sequence: ESC [ H
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* Effect: moves the cursor to upper left corner
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*
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* ED2 (Clear entire screen)
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* Sequence: ESC [ 2 J
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* Effect: clear the whole screen
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*
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* == For highlighting control characters, we also use the following two ==
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* SO (enter StandOut)
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* Sequence: ESC [ 7 m
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* Effect: Uses some standout mode such as reverse video
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*
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* SE (Standout End)
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* Sequence: ESC [ 0 m
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* Effect: Exit standout mode
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*
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* == Only used if TIOCGWINSZ fails ==
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* DSR/CPR (Report cursor position)
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* Sequence: ESC [ 6 n
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* Effect: reports current cursor position as ESC [ NNN ; MMM R
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*
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* == Only used in multiline mode ==
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* CUU (Cursor Up)
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* Sequence: ESC [ n A
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* Effect: moves cursor up n chars.
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*
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* CUD (Cursor Down)
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* Sequence: ESC [ n B
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* Effect: moves cursor down n chars.
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*
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* win32/console
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* -------------
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* If __MINGW32__ is defined, the win32 console API is used.
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* This could probably be made to work for the msvc compiler too.
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* This support based in part on work by Jon Griffiths.
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*/
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#ifdef _WIN32 /* Windows platform, either MinGW or Visual Studio (MSVC) */
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#include <windows.h>
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#include <fcntl.h>
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#define USE_WINCONSOLE
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#ifdef __MINGW32__
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#define HAVE_UNISTD_H
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#else
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/* Microsoft headers don't like old POSIX names */
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#define strdup _strdup
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#define snprintf _snprintf
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#endif
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#else
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#include <termios.h>
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#include <sys/ioctl.h>
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#include <poll.h>
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#define USE_TERMIOS
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#define HAVE_UNISTD_H
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include "linenoise.h"
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#ifndef STRINGBUF_H
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#include "stringbuf.h"
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#endif
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#include "utf8.h"
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#define LINENOISE_DEFAULT_HISTORY_MAX_LEN 100
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#define ctrl(C) ((C) - '@')
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/* Use -ve numbers here to co-exist with normal unicode chars */
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enum {
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SPECIAL_NONE,
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/* don't use -1 here since that indicates error */
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SPECIAL_UP = -20,
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SPECIAL_DOWN = -21,
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SPECIAL_LEFT = -22,
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SPECIAL_RIGHT = -23,
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SPECIAL_DELETE = -24,
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SPECIAL_HOME = -25,
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SPECIAL_END = -26,
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SPECIAL_INSERT = -27,
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SPECIAL_PAGE_UP = -28,
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SPECIAL_PAGE_DOWN = -29,
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/* Some handy names for other special keycodes */
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CHAR_ESCAPE = 27,
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CHAR_DELETE = 127,
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};
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static int history_max_len = LINENOISE_DEFAULT_HISTORY_MAX_LEN;
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static int history_len = 0;
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static char **history = NULL;
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/* Structure to contain the status of the current (being edited) line */
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struct current {
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stringbuf *buf; /* Current buffer. Always null terminated */
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int pos; /* Cursor position, measured in chars */
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int cols; /* Size of the window, in chars */
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int nrows; /* How many rows are being used in multiline mode (>= 1) */
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int rpos; /* The current row containing the cursor - multiline mode only */
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int colsright; /* refreshLine() cached cols for insert_char() optimisation */
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int colsleft; /* refreshLine() cached cols for remove_char() optimisation */
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const char *prompt;
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stringbuf *capture; /* capture buffer, or NULL for none. Always null terminated */
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stringbuf *output; /* used only during refreshLine() - output accumulator */
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#if defined(USE_TERMIOS)
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int fd; /* Terminal fd */
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#elif defined(USE_WINCONSOLE)
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HANDLE outh; /* Console output handle */
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HANDLE inh; /* Console input handle */
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int rows; /* Screen rows */
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int x; /* Current column during output */
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int y; /* Current row */
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#ifdef USE_UTF8
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#define UBUF_MAX_CHARS 132
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WORD ubuf[UBUF_MAX_CHARS + 1]; /* Accumulates utf16 output - one extra for final surrogate pairs */
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int ubuflen; /* length used in ubuf */
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int ubufcols; /* how many columns are represented by the chars in ubuf? */
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#endif
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#endif
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};
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static int fd_read(struct current *current);
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static int getWindowSize(struct current *current);
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static void cursorDown(struct current *current, int n);
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static void cursorUp(struct current *current, int n);
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static void eraseEol(struct current *current);
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static void refreshLine(struct current *current);
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static void refreshLineAlt(struct current *current, const char *prompt, const char *buf, int cursor_pos);
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static void setCursorPos(struct current *current, int x);
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static void setOutputHighlight(struct current *current, const int *props, int nprops);
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static void set_current(struct current *current, const char *str);
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void linenoiseHistoryFree(void) {
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if (history) {
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int j;
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for (j = 0; j < history_len; j++)
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free(history[j]);
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free(history);
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history = NULL;
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history_len = 0;
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}
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}
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struct esc_parser {
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enum {
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EP_START, /* looking for ESC */
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EP_ESC, /* looking for [ */
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EP_DIGITS, /* parsing digits */
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EP_PROPS, /* parsing digits or semicolons */
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EP_END, /* ok */
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EP_ERROR, /* error */
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} state;
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int props[5]; /* properties are stored here */
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int maxprops; /* size of the props[] array */
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int numprops; /* number of properties found */
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int termchar; /* terminator char, or 0 for any alpha */
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int current; /* current (partial) property value */
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};
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/**
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|
* Initialise the escape sequence parser at *parser.
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*
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|
* If termchar is 0 any alpha char terminates ok. Otherwise only the given
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|
* char terminates successfully.
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|
* Run the parser state machine with calls to parseEscapeSequence() for each char.
|
|
*/
|
|
static void initParseEscapeSeq(struct esc_parser *parser, int termchar)
|
|
{
|
|
parser->state = EP_START;
|
|
parser->maxprops = sizeof(parser->props) / sizeof(*parser->props);
|
|
parser->numprops = 0;
|
|
parser->current = 0;
|
|
parser->termchar = termchar;
|
|
}
|
|
|
|
/**
|
|
* Pass character 'ch' into the state machine to parse:
|
|
* 'ESC' '[' <digits> (';' <digits>)* <termchar>
|
|
*
|
|
* The first character must be ESC.
|
|
* Returns the current state. The state machine is done when it returns either EP_END
|
|
* or EP_ERROR.
|
|
*
|
|
* On EP_END, the "property/attribute" values can be read from parser->props[]
|
|
* of length parser->numprops.
|
|
*/
|
|
static int parseEscapeSequence(struct esc_parser *parser, int ch)
|
|
{
|
|
switch (parser->state) {
|
|
case EP_START:
|
|
parser->state = (ch == '\x1b') ? EP_ESC : EP_ERROR;
|
|
break;
|
|
case EP_ESC:
|
|
parser->state = (ch == '[') ? EP_DIGITS : EP_ERROR;
|
|
break;
|
|
case EP_PROPS:
|
|
if (ch == ';') {
|
|
parser->state = EP_DIGITS;
|
|
donedigits:
|
|
if (parser->numprops + 1 < parser->maxprops) {
|
|
parser->props[parser->numprops++] = parser->current;
|
|
parser->current = 0;
|
|
}
|
|
break;
|
|
}
|
|
/* fall through */
|
|
case EP_DIGITS:
|
|
if (ch >= '0' && ch <= '9') {
|
|
parser->current = parser->current * 10 + (ch - '0');
|
|
parser->state = EP_PROPS;
|
|
break;
|
|
}
|
|
/* must be terminator */
|
|
if (parser->termchar != ch) {
|
|
if (parser->termchar != 0 || !((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z'))) {
|
|
parser->state = EP_ERROR;
|
|
break;
|
|
}
|
|
}
|
|
parser->state = EP_END;
|
|
goto donedigits;
|
|
case EP_END:
|
|
parser->state = EP_ERROR;
|
|
break;
|
|
case EP_ERROR:
|
|
break;
|
|
}
|
|
return parser->state;
|
|
}
|
|
|
|
/*#define DEBUG_REFRESHLINE*/
|
|
|
|
#ifdef DEBUG_REFRESHLINE
|
|
#define DRL(ARGS...) fprintf(dfh, ARGS)
|
|
static FILE *dfh;
|
|
|
|
static void DRL_CHAR(int ch)
|
|
{
|
|
if (ch < ' ') {
|
|
DRL("^%c", ch + '@');
|
|
}
|
|
else if (ch > 127) {
|
|
DRL("\\u%04x", ch);
|
|
}
|
|
else {
|
|
DRL("%c", ch);
|
|
}
|
|
}
|
|
static void DRL_STR(const char *str)
|
|
{
|
|
while (*str) {
|
|
int ch;
|
|
int n = utf8_tounicode(str, &ch);
|
|
str += n;
|
|
DRL_CHAR(ch);
|
|
}
|
|
}
|
|
#else
|
|
#define DRL(ARGS...)
|
|
#define DRL_CHAR(ch)
|
|
#define DRL_STR(str)
|
|
#endif
|
|
|
|
#if defined(USE_WINCONSOLE)
|
|
#include "linenoise-win32.c"
|
|
#endif
|
|
|
|
#if defined(USE_TERMIOS)
|
|
static void linenoiseAtExit(void);
|
|
static struct termios orig_termios; /* in order to restore at exit */
|
|
static int rawmode = 0; /* for atexit() function to check if restore is needed*/
|
|
static int atexit_registered = 0; /* register atexit just 1 time */
|
|
|
|
static const char *unsupported_term[] = {"dumb","cons25","emacs",NULL};
|
|
|
|
static int isUnsupportedTerm(void) {
|
|
char *term = getenv("TERM");
|
|
|
|
if (term) {
|
|
int j;
|
|
for (j = 0; unsupported_term[j]; j++) {
|
|
if (strcmp(term, unsupported_term[j]) == 0) {
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int enableRawMode(struct current *current) {
|
|
struct termios raw;
|
|
|
|
current->fd = STDIN_FILENO;
|
|
current->cols = 0;
|
|
|
|
if (!isatty(current->fd) || isUnsupportedTerm() ||
|
|
tcgetattr(current->fd, &orig_termios) == -1) {
|
|
fatal:
|
|
errno = ENOTTY;
|
|
return -1;
|
|
}
|
|
|
|
if (!atexit_registered) {
|
|
atexit(linenoiseAtExit);
|
|
atexit_registered = 1;
|
|
}
|
|
|
|
raw = orig_termios; /* modify the original mode */
|
|
/* input modes: no break, no CR to NL, no parity check, no strip char,
|
|
* no start/stop output control. */
|
|
raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
|
|
/* output modes - actually, no need to disable post processing */
|
|
/*raw.c_oflag &= ~(OPOST);*/
|
|
/* control modes - set 8 bit chars */
|
|
raw.c_cflag |= (CS8);
|
|
/* local modes - choing off, canonical off, no extended functions,
|
|
* no signal chars (^Z,^C) */
|
|
raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
|
|
/* control chars - set return condition: min number of bytes and timer.
|
|
* We want read to return every single byte, without timeout. */
|
|
raw.c_cc[VMIN] = 1; raw.c_cc[VTIME] = 0; /* 1 byte, no timer */
|
|
|
|
/* put terminal in raw mode after flushing */
|
|
if (tcsetattr(current->fd,TCSADRAIN,&raw) < 0) {
|
|
goto fatal;
|
|
}
|
|
rawmode = 1;
|
|
return 0;
|
|
}
|
|
|
|
static void disableRawMode(struct current *current) {
|
|
/* Don't even check the return value as it's too late. */
|
|
if (rawmode && tcsetattr(current->fd,TCSADRAIN,&orig_termios) != -1)
|
|
rawmode = 0;
|
|
}
|
|
|
|
/* At exit we'll try to fix the terminal to the initial conditions. */
|
|
static void linenoiseAtExit(void) {
|
|
if (rawmode) {
|
|
tcsetattr(STDIN_FILENO, TCSADRAIN, &orig_termios);
|
|
}
|
|
linenoiseHistoryFree();
|
|
}
|
|
|
|
/* gcc/glibc insists that we care about the return code of write!
|
|
* Clarification: This means that a void-cast like "(void) (EXPR)"
|
|
* does not work.
|
|
*/
|
|
#define IGNORE_RC(EXPR) if (EXPR) {}
|
|
|
|
/**
|
|
* Output bytes directly, or accumulate output (if current->output is set)
|
|
*/
|
|
static void outputChars(struct current *current, const char *buf, int len)
|
|
{
|
|
if (len < 0) {
|
|
len = strlen(buf);
|
|
}
|
|
if (current->output) {
|
|
sb_append_len(current->output, buf, len);
|
|
}
|
|
else {
|
|
IGNORE_RC(write(current->fd, buf, len));
|
|
}
|
|
}
|
|
|
|
/* Like outputChars, but using printf-style formatting
|
|
*/
|
|
static void outputFormatted(struct current *current, const char *format, ...)
|
|
{
|
|
va_list args;
|
|
char buf[64];
|
|
int n;
|
|
|
|
va_start(args, format);
|
|
n = vsnprintf(buf, sizeof(buf), format, args);
|
|
/* This will never happen because we are sure to use outputFormatted() only for short sequences */
|
|
assert(n < (int)sizeof(buf));
|
|
va_end(args);
|
|
outputChars(current, buf, n);
|
|
}
|
|
|
|
static void cursorToLeft(struct current *current)
|
|
{
|
|
outputChars(current, "\r", -1);
|
|
}
|
|
|
|
static void setOutputHighlight(struct current *current, const int *props, int nprops)
|
|
{
|
|
outputChars(current, "\x1b[", -1);
|
|
while (nprops--) {
|
|
outputFormatted(current, "%d%c", *props, (nprops == 0) ? 'm' : ';');
|
|
props++;
|
|
}
|
|
}
|
|
|
|
static void eraseEol(struct current *current)
|
|
{
|
|
outputChars(current, "\x1b[0K", -1);
|
|
}
|
|
|
|
static void setCursorPos(struct current *current, int x)
|
|
{
|
|
if (x == 0) {
|
|
cursorToLeft(current);
|
|
}
|
|
else {
|
|
outputFormatted(current, "\r\x1b[%dC", x);
|
|
}
|
|
}
|
|
|
|
static void cursorUp(struct current *current, int n)
|
|
{
|
|
if (n) {
|
|
outputFormatted(current, "\x1b[%dA", n);
|
|
}
|
|
}
|
|
|
|
static void cursorDown(struct current *current, int n)
|
|
{
|
|
if (n) {
|
|
outputFormatted(current, "\x1b[%dB", n);
|
|
}
|
|
}
|
|
|
|
void linenoiseClearScreen(void)
|
|
{
|
|
IGNORE_RC(write(STDOUT_FILENO, "\x1b[H\x1b[2J", 7));
|
|
}
|
|
|
|
/**
|
|
* Reads a char from 'fd', waiting at most 'timeout' milliseconds.
|
|
*
|
|
* A timeout of -1 means to wait forever.
|
|
*
|
|
* Returns -1 if no char is received within the time or an error occurs.
|
|
*/
|
|
static int fd_read_char(int fd, int timeout)
|
|
{
|
|
struct pollfd p;
|
|
unsigned char c;
|
|
|
|
p.fd = fd;
|
|
p.events = POLLIN;
|
|
|
|
if (poll(&p, 1, timeout) == 0) {
|
|
/* timeout */
|
|
return -1;
|
|
}
|
|
if (read(fd, &c, 1) != 1) {
|
|
return -1;
|
|
}
|
|
return c;
|
|
}
|
|
|
|
/**
|
|
* Reads a complete utf-8 character
|
|
* and returns the unicode value, or -1 on error.
|
|
*/
|
|
static int fd_read(struct current *current)
|
|
{
|
|
#ifdef USE_UTF8
|
|
char buf[MAX_UTF8_LEN];
|
|
int n;
|
|
int i;
|
|
int c;
|
|
|
|
if (read(current->fd, &buf[0], 1) != 1) {
|
|
return -1;
|
|
}
|
|
n = utf8_charlen(buf[0]);
|
|
if (n < 1) {
|
|
return -1;
|
|
}
|
|
for (i = 1; i < n; i++) {
|
|
if (read(current->fd, &buf[i], 1) != 1) {
|
|
return -1;
|
|
}
|
|
}
|
|
/* decode and return the character */
|
|
utf8_tounicode(buf, &c);
|
|
return c;
|
|
#else
|
|
return fd_read_char(current->fd, -1);
|
|
#endif
|
|
}
|
|
|
|
|
|
/**
|
|
* Stores the current cursor column in '*cols'.
|
|
* Returns 1 if OK, or 0 if failed to determine cursor pos.
|
|
*/
|
|
static int queryCursor(struct current *current, int* cols)
|
|
{
|
|
struct esc_parser parser;
|
|
int ch;
|
|
|
|
/* Should not be buffering this output, it needs to go immediately */
|
|
assert(current->output == NULL);
|
|
|
|
/* control sequence - report cursor location */
|
|
outputChars(current, "\x1b[6n", -1);
|
|
|
|
/* Parse the response: ESC [ rows ; cols R */
|
|
initParseEscapeSeq(&parser, 'R');
|
|
while ((ch = fd_read_char(current->fd, 100)) > 0) {
|
|
switch (parseEscapeSequence(&parser, ch)) {
|
|
default:
|
|
continue;
|
|
case EP_END:
|
|
if (parser.numprops == 2 && parser.props[1] < 1000) {
|
|
*cols = parser.props[1];
|
|
return 1;
|
|
}
|
|
break;
|
|
case EP_ERROR:
|
|
break;
|
|
}
|
|
/* failed */
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Updates current->cols with the current window size (width)
|
|
*/
|
|
static int getWindowSize(struct current *current)
|
|
{
|
|
struct winsize ws;
|
|
|
|
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == 0 && ws.ws_col != 0) {
|
|
current->cols = ws.ws_col;
|
|
return 0;
|
|
}
|
|
|
|
/* Failed to query the window size. Perhaps we are on a serial terminal.
|
|
* Try to query the width by sending the cursor as far to the right
|
|
* and reading back the cursor position.
|
|
* Note that this is only done once per call to linenoise rather than
|
|
* every time the line is refreshed for efficiency reasons.
|
|
*
|
|
* In more detail, we:
|
|
* (a) request current cursor position,
|
|
* (b) move cursor far right,
|
|
* (c) request cursor position again,
|
|
* (d) at last move back to the old position.
|
|
* This gives us the width without messing with the externally
|
|
* visible cursor position.
|
|
*/
|
|
|
|
if (current->cols == 0) {
|
|
int here;
|
|
|
|
/* If anything fails => default 80 */
|
|
current->cols = 80;
|
|
|
|
/* (a) */
|
|
if (queryCursor (current, &here)) {
|
|
/* (b) */
|
|
setCursorPos(current, 999);
|
|
|
|
/* (c). Note: If (a) succeeded, then (c) should as well.
|
|
* For paranoia we still check and have a fallback action
|
|
* for (d) in case of failure..
|
|
*/
|
|
if (queryCursor (current, ¤t->cols)) {
|
|
/* (d) Reset the cursor back to the original location. */
|
|
if (current->cols > here) {
|
|
setCursorPos(current, here);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* If CHAR_ESCAPE was received, reads subsequent
|
|
* chars to determine if this is a known special key.
|
|
*
|
|
* Returns SPECIAL_NONE if unrecognised, or -1 if EOF.
|
|
*
|
|
* If no additional char is received within a short time,
|
|
* CHAR_ESCAPE is returned.
|
|
*/
|
|
static int check_special(int fd)
|
|
{
|
|
int c = fd_read_char(fd, 50);
|
|
int c2;
|
|
|
|
if (c < 0) {
|
|
return CHAR_ESCAPE;
|
|
}
|
|
|
|
c2 = fd_read_char(fd, 50);
|
|
if (c2 < 0) {
|
|
return c2;
|
|
}
|
|
if (c == '[' || c == 'O') {
|
|
/* Potential arrow key */
|
|
switch (c2) {
|
|
case 'A':
|
|
return SPECIAL_UP;
|
|
case 'B':
|
|
return SPECIAL_DOWN;
|
|
case 'C':
|
|
return SPECIAL_RIGHT;
|
|
case 'D':
|
|
return SPECIAL_LEFT;
|
|
case 'F':
|
|
return SPECIAL_END;
|
|
case 'H':
|
|
return SPECIAL_HOME;
|
|
}
|
|
}
|
|
if (c == '[' && c2 >= '1' && c2 <= '8') {
|
|
/* extended escape */
|
|
c = fd_read_char(fd, 50);
|
|
if (c == '~') {
|
|
switch (c2) {
|
|
case '2':
|
|
return SPECIAL_INSERT;
|
|
case '3':
|
|
return SPECIAL_DELETE;
|
|
case '5':
|
|
return SPECIAL_PAGE_UP;
|
|
case '6':
|
|
return SPECIAL_PAGE_DOWN;
|
|
case '7':
|
|
return SPECIAL_HOME;
|
|
case '8':
|
|
return SPECIAL_END;
|
|
}
|
|
}
|
|
while (c != -1 && c != '~') {
|
|
/* .e.g \e[12~ or '\e[11;2~ discard the complete sequence */
|
|
c = fd_read_char(fd, 50);
|
|
}
|
|
}
|
|
|
|
return SPECIAL_NONE;
|
|
}
|
|
#endif
|
|
|
|
static void clearOutputHighlight(struct current *current)
|
|
{
|
|
int nohighlight = 0;
|
|
setOutputHighlight(current, &nohighlight, 1);
|
|
}
|
|
|
|
static void outputControlChar(struct current *current, char ch)
|
|
{
|
|
int reverse = 7;
|
|
setOutputHighlight(current, &reverse, 1);
|
|
outputChars(current, "^", 1);
|
|
outputChars(current, &ch, 1);
|
|
clearOutputHighlight(current);
|
|
}
|
|
|
|
#ifndef utf8_getchars
|
|
static int utf8_getchars(char *buf, int c)
|
|
{
|
|
#ifdef USE_UTF8
|
|
return utf8_fromunicode(buf, c);
|
|
#else
|
|
*buf = c;
|
|
return 1;
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* Returns the unicode character at the given offset,
|
|
* or -1 if none.
|
|
*/
|
|
static int get_char(struct current *current, int pos)
|
|
{
|
|
if (pos >= 0 && pos < sb_chars(current->buf)) {
|
|
int c;
|
|
int i = utf8_index(sb_str(current->buf), pos);
|
|
(void)utf8_tounicode(sb_str(current->buf) + i, &c);
|
|
return c;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int char_display_width(int ch)
|
|
{
|
|
if (ch < ' ') {
|
|
/* control chars take two positions */
|
|
return 2;
|
|
}
|
|
else {
|
|
return utf8_width(ch);
|
|
}
|
|
}
|
|
|
|
#ifndef NO_COMPLETION
|
|
static linenoiseCompletionCallback *completionCallback = NULL;
|
|
static void *completionUserdata = NULL;
|
|
static int showhints = 1;
|
|
static linenoiseHintsCallback *hintsCallback = NULL;
|
|
static linenoiseFreeHintsCallback *freeHintsCallback = NULL;
|
|
static void *hintsUserdata = NULL;
|
|
|
|
static void beep() {
|
|
#ifdef USE_TERMIOS
|
|
fprintf(stderr, "\x7");
|
|
fflush(stderr);
|
|
#endif
|
|
}
|
|
|
|
static void freeCompletions(linenoiseCompletions *lc) {
|
|
size_t i;
|
|
for (i = 0; i < lc->len; i++)
|
|
free(lc->cvec[i]);
|
|
free(lc->cvec);
|
|
}
|
|
|
|
static int completeLine(struct current *current) {
|
|
linenoiseCompletions lc = { 0, NULL };
|
|
int c = 0;
|
|
|
|
completionCallback(sb_str(current->buf),&lc,completionUserdata);
|
|
if (lc.len == 0) {
|
|
beep();
|
|
} else {
|
|
size_t stop = 0, i = 0;
|
|
|
|
while(!stop) {
|
|
/* Show completion or original buffer */
|
|
if (i < lc.len) {
|
|
int chars = utf8_strlen(lc.cvec[i], -1);
|
|
refreshLineAlt(current, current->prompt, lc.cvec[i], chars);
|
|
} else {
|
|
refreshLine(current);
|
|
}
|
|
|
|
c = fd_read(current);
|
|
if (c == -1) {
|
|
break;
|
|
}
|
|
|
|
switch(c) {
|
|
case '\t': /* tab */
|
|
i = (i+1) % (lc.len+1);
|
|
if (i == lc.len) beep();
|
|
break;
|
|
case CHAR_ESCAPE: /* escape */
|
|
/* Re-show original buffer */
|
|
if (i < lc.len) {
|
|
refreshLine(current);
|
|
}
|
|
stop = 1;
|
|
break;
|
|
default:
|
|
/* Update buffer and return */
|
|
if (i < lc.len) {
|
|
set_current(current,lc.cvec[i]);
|
|
}
|
|
stop = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
freeCompletions(&lc);
|
|
return c; /* Return last read character */
|
|
}
|
|
|
|
/* Register a callback function to be called for tab-completion.
|
|
Returns the prior callback so that the caller may (if needed)
|
|
restore it when done. */
|
|
linenoiseCompletionCallback * linenoiseSetCompletionCallback(linenoiseCompletionCallback *fn, void *userdata) {
|
|
linenoiseCompletionCallback * old = completionCallback;
|
|
completionCallback = fn;
|
|
completionUserdata = userdata;
|
|
return old;
|
|
}
|
|
|
|
void linenoiseAddCompletion(linenoiseCompletions *lc, const char *str) {
|
|
lc->cvec = (char **)realloc(lc->cvec,sizeof(char*)*(lc->len+1));
|
|
lc->cvec[lc->len++] = strdup(str);
|
|
}
|
|
|
|
void linenoiseSetHintsCallback(linenoiseHintsCallback *callback, void *userdata)
|
|
{
|
|
hintsCallback = callback;
|
|
hintsUserdata = userdata;
|
|
}
|
|
|
|
void linenoiseSetFreeHintsCallback(linenoiseFreeHintsCallback *callback)
|
|
{
|
|
freeHintsCallback = callback;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
static const char *reduceSingleBuf(const char *buf, int availcols, int *cursor_pos)
|
|
{
|
|
/* We have availcols columns available.
|
|
* If necessary, strip chars off the front of buf until *cursor_pos
|
|
* fits within availcols
|
|
*/
|
|
int needcols = 0;
|
|
int pos = 0;
|
|
int new_cursor_pos = *cursor_pos;
|
|
const char *pt = buf;
|
|
|
|
DRL("reduceSingleBuf: availcols=%d, cursor_pos=%d\n", availcols, *cursor_pos);
|
|
|
|
while (*pt) {
|
|
int ch;
|
|
int n = utf8_tounicode(pt, &ch);
|
|
pt += n;
|
|
|
|
needcols += char_display_width(ch);
|
|
|
|
/* If we need too many cols, strip
|
|
* chars off the front of buf to make it fit.
|
|
* We keep 3 extra cols to the right of the cursor.
|
|
* 2 for possible wide chars, 1 for the last column that
|
|
* can't be used.
|
|
*/
|
|
while (needcols >= availcols - 3) {
|
|
n = utf8_tounicode(buf, &ch);
|
|
buf += n;
|
|
needcols -= char_display_width(ch);
|
|
DRL_CHAR(ch);
|
|
|
|
/* and adjust the apparent cursor position */
|
|
new_cursor_pos--;
|
|
|
|
if (buf == pt) {
|
|
/* can't remove more than this */
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (pos++ == *cursor_pos) {
|
|
break;
|
|
}
|
|
|
|
}
|
|
DRL("<snip>");
|
|
DRL_STR(buf);
|
|
DRL("\nafter reduce, needcols=%d, new_cursor_pos=%d\n", needcols, new_cursor_pos);
|
|
|
|
/* Done, now new_cursor_pos contains the adjusted cursor position
|
|
* and buf points to he adjusted start
|
|
*/
|
|
*cursor_pos = new_cursor_pos;
|
|
return buf;
|
|
}
|
|
|
|
static int mlmode = 0;
|
|
|
|
void linenoiseSetMultiLine(int enableml)
|
|
{
|
|
mlmode = enableml;
|
|
}
|
|
|
|
/* Helper of refreshSingleLine() and refreshMultiLine() to show hints
|
|
* to the right of the prompt.
|
|
* Returns 1 if a hint was shown, or 0 if not
|
|
* If 'display' is 0, does no output. Just returns the appropriate return code.
|
|
*/
|
|
static int refreshShowHints(struct current *current, const char *buf, int availcols, int display)
|
|
{
|
|
int rc = 0;
|
|
if (showhints && hintsCallback && availcols > 0) {
|
|
int bold = 0;
|
|
int color = -1;
|
|
char *hint = hintsCallback(buf, &color, &bold, hintsUserdata);
|
|
if (hint) {
|
|
rc = 1;
|
|
if (display) {
|
|
const char *pt;
|
|
if (bold == 1 && color == -1) color = 37;
|
|
if (bold || color > 0) {
|
|
int props[3] = { bold, color, 49 }; /* bold, color, fgnormal */
|
|
setOutputHighlight(current, props, 3);
|
|
}
|
|
DRL("<hint bold=%d,color=%d>", bold, color);
|
|
pt = hint;
|
|
while (*pt) {
|
|
int ch;
|
|
int n = utf8_tounicode(pt, &ch);
|
|
int width = char_display_width(ch);
|
|
|
|
if (width >= availcols) {
|
|
DRL("<hinteol>");
|
|
break;
|
|
}
|
|
DRL_CHAR(ch);
|
|
|
|
availcols -= width;
|
|
outputChars(current, pt, n);
|
|
pt += n;
|
|
}
|
|
if (bold || color > 0) {
|
|
clearOutputHighlight(current);
|
|
}
|
|
/* Call the function to free the hint returned. */
|
|
if (freeHintsCallback) freeHintsCallback(hint, hintsUserdata);
|
|
}
|
|
}
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
#ifdef USE_TERMIOS
|
|
static void refreshStart(struct current *current)
|
|
{
|
|
/* We accumulate all output here */
|
|
assert(current->output == NULL);
|
|
current->output = sb_alloc();
|
|
}
|
|
|
|
static void refreshEnd(struct current *current)
|
|
{
|
|
/* Output everything at once */
|
|
IGNORE_RC(write(current->fd, sb_str(current->output), sb_len(current->output)));
|
|
sb_free(current->output);
|
|
current->output = NULL;
|
|
}
|
|
|
|
static void refreshStartChars(struct current *current)
|
|
{
|
|
}
|
|
|
|
static void refreshNewline(struct current *current)
|
|
{
|
|
DRL("<nl>");
|
|
outputChars(current, "\n", 1);
|
|
}
|
|
|
|
static void refreshEndChars(struct current *current)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static void refreshLineAlt(struct current *current, const char *prompt, const char *buf, int cursor_pos)
|
|
{
|
|
int i;
|
|
const char *pt;
|
|
int displaycol;
|
|
int displayrow;
|
|
int visible;
|
|
int currentpos;
|
|
int notecursor;
|
|
int cursorcol = 0;
|
|
int cursorrow = 0;
|
|
int hint;
|
|
struct esc_parser parser;
|
|
|
|
#ifdef DEBUG_REFRESHLINE
|
|
dfh = fopen("linenoise.debuglog", "a");
|
|
#endif
|
|
|
|
/* Should intercept SIGWINCH. For now, just get the size every time */
|
|
getWindowSize(current);
|
|
|
|
refreshStart(current);
|
|
|
|
DRL("wincols=%d, cursor_pos=%d, nrows=%d, rpos=%d\n", current->cols, cursor_pos, current->nrows, current->rpos);
|
|
|
|
/* Here is the plan:
|
|
* (a) move the the bottom row, going down the appropriate number of lines
|
|
* (b) move to beginning of line and erase the current line
|
|
* (c) go up one line and do the same, until we have erased up to the first row
|
|
* (d) output the prompt, counting cols and rows, taking into account escape sequences
|
|
* (e) output the buffer, counting cols and rows
|
|
* (e') when we hit the current pos, save the cursor position
|
|
* (f) move the cursor to the saved cursor position
|
|
* (g) save the current cursor row and number of rows
|
|
*/
|
|
|
|
/* (a) - The cursor is currently at row rpos */
|
|
cursorDown(current, current->nrows - current->rpos - 1);
|
|
DRL("<cud=%d>", current->nrows - current->rpos - 1);
|
|
|
|
/* (b), (c) - Erase lines upwards until we get to the first row */
|
|
for (i = 0; i < current->nrows; i++) {
|
|
if (i) {
|
|
DRL("<cup>");
|
|
cursorUp(current, 1);
|
|
}
|
|
DRL("<clearline>");
|
|
cursorToLeft(current);
|
|
eraseEol(current);
|
|
}
|
|
DRL("\n");
|
|
|
|
/* (d) First output the prompt. control sequences don't take up display space */
|
|
pt = prompt;
|
|
displaycol = 0; /* current display column */
|
|
displayrow = 0; /* current display row */
|
|
visible = 1;
|
|
|
|
refreshStartChars(current);
|
|
|
|
while (*pt) {
|
|
int width;
|
|
int ch;
|
|
int n = utf8_tounicode(pt, &ch);
|
|
|
|
if (visible && ch == CHAR_ESCAPE) {
|
|
/* The start of an escape sequence, so not visible */
|
|
visible = 0;
|
|
initParseEscapeSeq(&parser, 'm');
|
|
DRL("<esc-seq-start>");
|
|
}
|
|
|
|
if (ch == '\n' || ch == '\r') {
|
|
/* treat both CR and NL the same and force wrap */
|
|
refreshNewline(current);
|
|
displaycol = 0;
|
|
displayrow++;
|
|
}
|
|
else {
|
|
width = visible * utf8_width(ch);
|
|
|
|
displaycol += width;
|
|
if (displaycol >= current->cols) {
|
|
/* need to wrap to the next line because of newline or if it doesn't fit
|
|
* XXX this is a problem in single line mode
|
|
*/
|
|
refreshNewline(current);
|
|
displaycol = width;
|
|
displayrow++;
|
|
}
|
|
|
|
DRL_CHAR(ch);
|
|
#ifdef USE_WINCONSOLE
|
|
if (visible) {
|
|
outputChars(current, pt, n);
|
|
}
|
|
#else
|
|
outputChars(current, pt, n);
|
|
#endif
|
|
}
|
|
pt += n;
|
|
|
|
if (!visible) {
|
|
switch (parseEscapeSequence(&parser, ch)) {
|
|
case EP_END:
|
|
visible = 1;
|
|
setOutputHighlight(current, parser.props, parser.numprops);
|
|
DRL("<esc-seq-end,numprops=%d>", parser.numprops);
|
|
break;
|
|
case EP_ERROR:
|
|
DRL("<esc-seq-err>");
|
|
visible = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now we are at the first line with all lines erased */
|
|
DRL("\nafter prompt: displaycol=%d, displayrow=%d\n", displaycol, displayrow);
|
|
|
|
|
|
/* (e) output the buffer, counting cols and rows */
|
|
if (mlmode == 0) {
|
|
/* In this mode we may need to trim chars from the start of the buffer until the
|
|
* cursor fits in the window.
|
|
*/
|
|
pt = reduceSingleBuf(buf, current->cols - displaycol, &cursor_pos);
|
|
}
|
|
else {
|
|
pt = buf;
|
|
}
|
|
|
|
currentpos = 0;
|
|
notecursor = -1;
|
|
|
|
while (*pt) {
|
|
int ch;
|
|
int n = utf8_tounicode(pt, &ch);
|
|
int width = char_display_width(ch);
|
|
|
|
if (currentpos == cursor_pos) {
|
|
/* (e') wherever we output this character is where we want the cursor */
|
|
notecursor = 1;
|
|
}
|
|
|
|
if (displaycol + width >= current->cols) {
|
|
if (mlmode == 0) {
|
|
/* In single line mode stop once we print as much as we can on one line */
|
|
DRL("<slmode>");
|
|
break;
|
|
}
|
|
/* need to wrap to the next line since it doesn't fit */
|
|
refreshNewline(current);
|
|
displaycol = 0;
|
|
displayrow++;
|
|
}
|
|
|
|
if (notecursor == 1) {
|
|
/* (e') Save this position as the current cursor position */
|
|
cursorcol = displaycol;
|
|
cursorrow = displayrow;
|
|
notecursor = 0;
|
|
DRL("<cursor>");
|
|
}
|
|
|
|
displaycol += width;
|
|
|
|
if (ch < ' ') {
|
|
outputControlChar(current, ch + '@');
|
|
}
|
|
else {
|
|
outputChars(current, pt, n);
|
|
}
|
|
DRL_CHAR(ch);
|
|
if (width != 1) {
|
|
DRL("<w=%d>", width);
|
|
}
|
|
|
|
pt += n;
|
|
currentpos++;
|
|
}
|
|
|
|
/* If we didn't see the cursor, it is at the current location */
|
|
if (notecursor) {
|
|
DRL("<cursor>");
|
|
cursorcol = displaycol;
|
|
cursorrow = displayrow;
|
|
}
|
|
|
|
DRL("\nafter buf: displaycol=%d, displayrow=%d, cursorcol=%d, cursorrow=%d\n", displaycol, displayrow, cursorcol, cursorrow);
|
|
|
|
/* (f) show hints */
|
|
hint = refreshShowHints(current, buf, current->cols - displaycol, 1);
|
|
|
|
/* Remember how many many cols are available for insert optimisation */
|
|
if (prompt == current->prompt && hint == 0) {
|
|
current->colsright = current->cols - displaycol;
|
|
current->colsleft = displaycol;
|
|
}
|
|
else {
|
|
/* Can't optimise */
|
|
current->colsright = 0;
|
|
current->colsleft = 0;
|
|
}
|
|
DRL("\nafter hints: colsleft=%d, colsright=%d\n\n", current->colsleft, current->colsright);
|
|
|
|
refreshEndChars(current);
|
|
|
|
/* (g) move the cursor to the correct place */
|
|
cursorUp(current, displayrow - cursorrow);
|
|
setCursorPos(current, cursorcol);
|
|
|
|
/* (h) Update the number of rows if larger, but never reduce this */
|
|
if (displayrow >= current->nrows) {
|
|
current->nrows = displayrow + 1;
|
|
}
|
|
/* And remember the row that the cursor is on */
|
|
current->rpos = cursorrow;
|
|
|
|
refreshEnd(current);
|
|
|
|
#ifdef DEBUG_REFRESHLINE
|
|
fclose(dfh);
|
|
#endif
|
|
}
|
|
|
|
static void refreshLine(struct current *current)
|
|
{
|
|
refreshLineAlt(current, current->prompt, sb_str(current->buf), current->pos);
|
|
}
|
|
|
|
static void set_current(struct current *current, const char *str)
|
|
{
|
|
sb_clear(current->buf);
|
|
sb_append(current->buf, str);
|
|
current->pos = sb_chars(current->buf);
|
|
}
|
|
|
|
/**
|
|
* Removes the char at 'pos'.
|
|
*
|
|
* Returns 1 if the line needs to be refreshed, 2 if not
|
|
* and 0 if nothing was removed
|
|
*/
|
|
static int remove_char(struct current *current, int pos)
|
|
{
|
|
if (pos >= 0 && pos < sb_chars(current->buf)) {
|
|
int offset = utf8_index(sb_str(current->buf), pos);
|
|
int nbytes = utf8_index(sb_str(current->buf) + offset, 1);
|
|
int rc = 1;
|
|
|
|
/* Now we try to optimise in the simple but very common case that:
|
|
* - outputChars() can be used directly (not win32)
|
|
* - we are removing the char at EOL
|
|
* - the buffer is not empty
|
|
* - there are columns available to the left
|
|
* - the char being deleted is not a wide or utf-8 character
|
|
* - no hints are being shown
|
|
*/
|
|
if (current->output && current->pos == pos + 1 && current->pos == sb_chars(current->buf) && pos > 0) {
|
|
#ifdef USE_UTF8
|
|
/* Could implement utf8_prev_len() but simplest just to not optimise this case */
|
|
char last = sb_str(current->buf)[offset];
|
|
#else
|
|
char last = 0;
|
|
#endif
|
|
if (current->colsleft > 0 && (last & 0x80) == 0) {
|
|
/* Have cols on the left and not a UTF-8 char or continuation */
|
|
/* Yes, can optimise */
|
|
current->colsleft--;
|
|
current->colsright++;
|
|
rc = 2;
|
|
}
|
|
}
|
|
|
|
sb_delete(current->buf, offset, nbytes);
|
|
|
|
if (current->pos > pos) {
|
|
current->pos--;
|
|
}
|
|
if (rc == 2) {
|
|
if (refreshShowHints(current, sb_str(current->buf), current->colsright, 0)) {
|
|
/* A hint needs to be shown, so can't optimise after all */
|
|
rc = 1;
|
|
}
|
|
else {
|
|
/* optimised output */
|
|
outputChars(current, "\b \b", 3);
|
|
}
|
|
}
|
|
return rc;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Insert 'ch' at position 'pos'
|
|
*
|
|
* Returns 1 if the line needs to be refreshed, 2 if not
|
|
* and 0 if nothing was inserted (no room)
|
|
*/
|
|
static int insert_char(struct current *current, int pos, int ch)
|
|
{
|
|
if (pos >= 0 && pos <= sb_chars(current->buf)) {
|
|
char buf[MAX_UTF8_LEN + 1];
|
|
int offset = utf8_index(sb_str(current->buf), pos);
|
|
int n = utf8_getchars(buf, ch);
|
|
int rc = 1;
|
|
|
|
/* null terminate since sb_insert() requires it */
|
|
buf[n] = 0;
|
|
|
|
/* Now we try to optimise in the simple but very common case that:
|
|
* - outputChars() can be used directly (not win32)
|
|
* - we are inserting at EOL
|
|
* - there are enough columns available
|
|
* - no hints are being shown
|
|
*/
|
|
if (current->output && pos == current->pos && pos == sb_chars(current->buf)) {
|
|
int width = char_display_width(ch);
|
|
if (current->colsright > width) {
|
|
/* Yes, can optimise */
|
|
current->colsright -= width;
|
|
current->colsleft -= width;
|
|
rc = 2;
|
|
}
|
|
}
|
|
sb_insert(current->buf, offset, buf);
|
|
if (current->pos >= pos) {
|
|
current->pos++;
|
|
}
|
|
if (rc == 2) {
|
|
if (refreshShowHints(current, sb_str(current->buf), current->colsright, 0)) {
|
|
/* A hint needs to be shown, so can't optimise after all */
|
|
rc = 1;
|
|
}
|
|
else {
|
|
/* optimised output */
|
|
outputChars(current, buf, n);
|
|
}
|
|
}
|
|
return rc;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Captures up to 'n' characters starting at 'pos' for the cut buffer.
|
|
*
|
|
* This replaces any existing characters in the cut buffer.
|
|
*/
|
|
static void capture_chars(struct current *current, int pos, int nchars)
|
|
{
|
|
if (pos >= 0 && (pos + nchars - 1) < sb_chars(current->buf)) {
|
|
int offset = utf8_index(sb_str(current->buf), pos);
|
|
int nbytes = utf8_index(sb_str(current->buf) + offset, nchars);
|
|
|
|
if (nbytes > 0) {
|
|
if (current->capture) {
|
|
sb_clear(current->capture);
|
|
}
|
|
else {
|
|
current->capture = sb_alloc();
|
|
}
|
|
sb_append_len(current->capture, sb_str(current->buf) + offset, nbytes);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Removes up to 'n' characters at cursor position 'pos'.
|
|
*
|
|
* Returns 0 if no chars were removed or non-zero otherwise.
|
|
*/
|
|
static int remove_chars(struct current *current, int pos, int n)
|
|
{
|
|
int removed = 0;
|
|
|
|
/* First save any chars which will be removed */
|
|
capture_chars(current, pos, n);
|
|
|
|
while (n-- && remove_char(current, pos)) {
|
|
removed++;
|
|
}
|
|
return removed;
|
|
}
|
|
/**
|
|
* Inserts the characters (string) 'chars' at the cursor position 'pos'.
|
|
*
|
|
* Returns 0 if no chars were inserted or non-zero otherwise.
|
|
*/
|
|
static int insert_chars(struct current *current, int pos, const char *chars)
|
|
{
|
|
int inserted = 0;
|
|
|
|
while (*chars) {
|
|
int ch;
|
|
int n = utf8_tounicode(chars, &ch);
|
|
if (insert_char(current, pos, ch) == 0) {
|
|
break;
|
|
}
|
|
inserted++;
|
|
pos++;
|
|
chars += n;
|
|
}
|
|
return inserted;
|
|
}
|
|
|
|
/**
|
|
* Returns the keycode to process, or 0 if none.
|
|
*/
|
|
static int reverseIncrementalSearch(struct current *current)
|
|
{
|
|
/* Display the reverse-i-search prompt and process chars */
|
|
char rbuf[50];
|
|
char rprompt[80];
|
|
int rchars = 0;
|
|
int rlen = 0;
|
|
int searchpos = history_len - 1;
|
|
int c;
|
|
|
|
rbuf[0] = 0;
|
|
while (1) {
|
|
int n = 0;
|
|
const char *p = NULL;
|
|
int skipsame = 0;
|
|
int searchdir = -1;
|
|
|
|
snprintf(rprompt, sizeof(rprompt), "(reverse-i-search)'%s': ", rbuf);
|
|
refreshLineAlt(current, rprompt, sb_str(current->buf), current->pos);
|
|
c = fd_read(current);
|
|
if (c == ctrl('H') || c == CHAR_DELETE) {
|
|
if (rchars) {
|
|
int p = utf8_index(rbuf, --rchars);
|
|
rbuf[p] = 0;
|
|
rlen = strlen(rbuf);
|
|
}
|
|
continue;
|
|
}
|
|
#ifdef USE_TERMIOS
|
|
if (c == CHAR_ESCAPE) {
|
|
c = check_special(current->fd);
|
|
}
|
|
#endif
|
|
if (c == ctrl('P') || c == SPECIAL_UP) {
|
|
/* Search for the previous (earlier) match */
|
|
if (searchpos > 0) {
|
|
searchpos--;
|
|
}
|
|
skipsame = 1;
|
|
}
|
|
else if (c == ctrl('N') || c == SPECIAL_DOWN) {
|
|
/* Search for the next (later) match */
|
|
if (searchpos < history_len) {
|
|
searchpos++;
|
|
}
|
|
searchdir = 1;
|
|
skipsame = 1;
|
|
}
|
|
else if (c >= ' ') {
|
|
/* >= here to allow for null terminator */
|
|
if (rlen >= (int)sizeof(rbuf) - MAX_UTF8_LEN) {
|
|
continue;
|
|
}
|
|
|
|
n = utf8_getchars(rbuf + rlen, c);
|
|
rlen += n;
|
|
rchars++;
|
|
rbuf[rlen] = 0;
|
|
|
|
/* Adding a new char resets the search location */
|
|
searchpos = history_len - 1;
|
|
}
|
|
else {
|
|
/* Exit from incremental search mode */
|
|
break;
|
|
}
|
|
|
|
/* Now search through the history for a match */
|
|
for (; searchpos >= 0 && searchpos < history_len; searchpos += searchdir) {
|
|
p = strstr(history[searchpos], rbuf);
|
|
if (p) {
|
|
/* Found a match */
|
|
if (skipsame && strcmp(history[searchpos], sb_str(current->buf)) == 0) {
|
|
/* But it is identical, so skip it */
|
|
continue;
|
|
}
|
|
/* Copy the matching line and set the cursor position */
|
|
set_current(current,history[searchpos]);
|
|
current->pos = utf8_strlen(history[searchpos], p - history[searchpos]);
|
|
break;
|
|
}
|
|
}
|
|
if (!p && n) {
|
|
/* No match, so don't add it */
|
|
rchars--;
|
|
rlen -= n;
|
|
rbuf[rlen] = 0;
|
|
}
|
|
}
|
|
if (c == ctrl('G') || c == ctrl('C')) {
|
|
/* ctrl-g terminates the search with no effect */
|
|
set_current(current, "");
|
|
c = 0;
|
|
}
|
|
else if (c == ctrl('J')) {
|
|
/* ctrl-j terminates the search leaving the buffer in place */
|
|
c = 0;
|
|
}
|
|
|
|
/* Go process the char normally */
|
|
refreshLine(current);
|
|
return c;
|
|
}
|
|
|
|
static int linenoiseEdit(struct current *current) {
|
|
int history_index = 0;
|
|
|
|
/* The latest history entry is always our current buffer, that
|
|
* initially is just an empty string. */
|
|
linenoiseHistoryAdd("");
|
|
|
|
set_current(current, "");
|
|
refreshLine(current);
|
|
|
|
while(1) {
|
|
int dir = -1;
|
|
int c = fd_read(current);
|
|
|
|
#ifndef NO_COMPLETION
|
|
/* Only autocomplete when the callback is set. It returns < 0 when
|
|
* there was an error reading from fd. Otherwise it will return the
|
|
* character that should be handled next. */
|
|
if (c == '\t' && current->pos == sb_chars(current->buf) && completionCallback != NULL) {
|
|
c = completeLine(current);
|
|
}
|
|
#endif
|
|
if (c == ctrl('R')) {
|
|
/* reverse incremental search will provide an alternative keycode or 0 for none */
|
|
c = reverseIncrementalSearch(current);
|
|
/* go on to process the returned char normally */
|
|
}
|
|
|
|
#ifdef USE_TERMIOS
|
|
if (c == CHAR_ESCAPE) { /* escape sequence */
|
|
c = check_special(current->fd);
|
|
}
|
|
#endif
|
|
if (c == -1) {
|
|
/* Return on errors */
|
|
return sb_len(current->buf);
|
|
}
|
|
|
|
switch(c) {
|
|
case SPECIAL_NONE:
|
|
break;
|
|
case '\r': /* enter/CR */
|
|
case '\n': /* LF */
|
|
history_len--;
|
|
free(history[history_len]);
|
|
current->pos = sb_chars(current->buf);
|
|
if (mlmode || hintsCallback) {
|
|
showhints = 0;
|
|
refreshLine(current);
|
|
showhints = 1;
|
|
}
|
|
return sb_len(current->buf);
|
|
case ctrl('C'): /* ctrl-c */
|
|
errno = EAGAIN;
|
|
return -1;
|
|
case ctrl('Z'): /* ctrl-z */
|
|
#ifdef SIGTSTP
|
|
/* send ourselves SIGSUSP */
|
|
disableRawMode(current);
|
|
raise(SIGTSTP);
|
|
/* and resume */
|
|
enableRawMode(current);
|
|
refreshLine(current);
|
|
#endif
|
|
continue;
|
|
case CHAR_DELETE: /* backspace */
|
|
case ctrl('H'):
|
|
if (remove_char(current, current->pos - 1) == 1) {
|
|
refreshLine(current);
|
|
}
|
|
break;
|
|
case ctrl('D'): /* ctrl-d */
|
|
if (sb_len(current->buf) == 0) {
|
|
/* Empty line, so EOF */
|
|
history_len--;
|
|
free(history[history_len]);
|
|
return -1;
|
|
}
|
|
/* Otherwise fall through to delete char to right of cursor */
|
|
case SPECIAL_DELETE:
|
|
if (remove_char(current, current->pos) == 1) {
|
|
refreshLine(current);
|
|
}
|
|
break;
|
|
case SPECIAL_INSERT:
|
|
/* Ignore. Expansion Hook.
|
|
* Future possibility: Toggle Insert/Overwrite Modes
|
|
*/
|
|
break;
|
|
case ctrl('W'): /* ctrl-w, delete word at left. save deleted chars */
|
|
/* eat any spaces on the left */
|
|
{
|
|
int pos = current->pos;
|
|
while (pos > 0 && get_char(current, pos - 1) == ' ') {
|
|
pos--;
|
|
}
|
|
|
|
/* now eat any non-spaces on the left */
|
|
while (pos > 0 && get_char(current, pos - 1) != ' ') {
|
|
pos--;
|
|
}
|
|
|
|
if (remove_chars(current, pos, current->pos - pos)) {
|
|
refreshLine(current);
|
|
}
|
|
}
|
|
break;
|
|
case ctrl('T'): /* ctrl-t */
|
|
if (current->pos > 0 && current->pos <= sb_chars(current->buf)) {
|
|
/* If cursor is at end, transpose the previous two chars */
|
|
int fixer = (current->pos == sb_chars(current->buf));
|
|
c = get_char(current, current->pos - fixer);
|
|
remove_char(current, current->pos - fixer);
|
|
insert_char(current, current->pos - 1, c);
|
|
refreshLine(current);
|
|
}
|
|
break;
|
|
case ctrl('V'): /* ctrl-v */
|
|
/* Insert the ^V first */
|
|
if (insert_char(current, current->pos, c)) {
|
|
refreshLine(current);
|
|
/* Now wait for the next char. Can insert anything except \0 */
|
|
c = fd_read(current);
|
|
|
|
/* Remove the ^V first */
|
|
remove_char(current, current->pos - 1);
|
|
if (c > 0) {
|
|
/* Insert the actual char, can't be error or null */
|
|
insert_char(current, current->pos, c);
|
|
}
|
|
refreshLine(current);
|
|
}
|
|
break;
|
|
case ctrl('B'):
|
|
case SPECIAL_LEFT:
|
|
if (current->pos > 0) {
|
|
current->pos--;
|
|
refreshLine(current);
|
|
}
|
|
break;
|
|
case ctrl('F'):
|
|
case SPECIAL_RIGHT:
|
|
if (current->pos < sb_chars(current->buf)) {
|
|
current->pos++;
|
|
refreshLine(current);
|
|
}
|
|
break;
|
|
case SPECIAL_PAGE_UP:
|
|
dir = history_len - history_index - 1; /* move to start of history */
|
|
goto history_navigation;
|
|
case SPECIAL_PAGE_DOWN:
|
|
dir = -history_index; /* move to 0 == end of history, i.e. current */
|
|
goto history_navigation;
|
|
case ctrl('P'):
|
|
case SPECIAL_UP:
|
|
dir = 1;
|
|
goto history_navigation;
|
|
case ctrl('N'):
|
|
case SPECIAL_DOWN:
|
|
history_navigation:
|
|
if (history_len > 1) {
|
|
/* Update the current history entry before to
|
|
* overwrite it with tne next one. */
|
|
free(history[history_len - 1 - history_index]);
|
|
history[history_len - 1 - history_index] = strdup(sb_str(current->buf));
|
|
/* Show the new entry */
|
|
history_index += dir;
|
|
if (history_index < 0) {
|
|
history_index = 0;
|
|
break;
|
|
} else if (history_index >= history_len) {
|
|
history_index = history_len - 1;
|
|
break;
|
|
}
|
|
set_current(current, history[history_len - 1 - history_index]);
|
|
refreshLine(current);
|
|
}
|
|
break;
|
|
case ctrl('A'): /* Ctrl+a, go to the start of the line */
|
|
case SPECIAL_HOME:
|
|
current->pos = 0;
|
|
refreshLine(current);
|
|
break;
|
|
case ctrl('E'): /* ctrl+e, go to the end of the line */
|
|
case SPECIAL_END:
|
|
current->pos = sb_chars(current->buf);
|
|
refreshLine(current);
|
|
break;
|
|
case ctrl('U'): /* Ctrl+u, delete to beginning of line, save deleted chars. */
|
|
if (remove_chars(current, 0, current->pos)) {
|
|
refreshLine(current);
|
|
}
|
|
break;
|
|
case ctrl('K'): /* Ctrl+k, delete from current to end of line, save deleted chars. */
|
|
if (remove_chars(current, current->pos, sb_chars(current->buf) - current->pos)) {
|
|
refreshLine(current);
|
|
}
|
|
break;
|
|
case ctrl('Y'): /* Ctrl+y, insert saved chars at current position */
|
|
if (current->capture && insert_chars(current, current->pos, sb_str(current->capture))) {
|
|
refreshLine(current);
|
|
}
|
|
break;
|
|
case ctrl('L'): /* Ctrl+L, clear screen */
|
|
linenoiseClearScreen();
|
|
/* Force recalc of window size for serial terminals */
|
|
current->cols = 0;
|
|
current->rpos = 0;
|
|
refreshLine(current);
|
|
break;
|
|
default:
|
|
/* Only tab is allowed without ^V */
|
|
if (c == '\t' || c >= ' ') {
|
|
if (insert_char(current, current->pos, c) == 1) {
|
|
refreshLine(current);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
return sb_len(current->buf);
|
|
}
|
|
|
|
int linenoiseColumns(void)
|
|
{
|
|
struct current current;
|
|
current.output = NULL;
|
|
enableRawMode (¤t);
|
|
getWindowSize (¤t);
|
|
disableRawMode (¤t);
|
|
return current.cols;
|
|
}
|
|
|
|
/**
|
|
* Reads a line from the file handle (without the trailing NL or CRNL)
|
|
* and returns it in a stringbuf.
|
|
* Returns NULL if no characters are read before EOF or error.
|
|
*
|
|
* Note that the character count will *not* be correct for lines containing
|
|
* utf8 sequences. Do not rely on the character count.
|
|
*/
|
|
static stringbuf *sb_getline(FILE *fh)
|
|
{
|
|
stringbuf *sb = sb_alloc();
|
|
int c;
|
|
int n = 0;
|
|
|
|
while ((c = getc(fh)) != EOF) {
|
|
char ch;
|
|
n++;
|
|
if (c == '\r') {
|
|
/* CRLF -> LF */
|
|
continue;
|
|
}
|
|
if (c == '\n' || c == '\r') {
|
|
break;
|
|
}
|
|
ch = c;
|
|
/* ignore the effect of character count for partial utf8 sequences */
|
|
sb_append_len(sb, &ch, 1);
|
|
}
|
|
if (n == 0) {
|
|
sb_free(sb);
|
|
return NULL;
|
|
}
|
|
return sb;
|
|
}
|
|
|
|
char *linenoise(const char *prompt)
|
|
{
|
|
int count;
|
|
struct current current;
|
|
stringbuf *sb;
|
|
|
|
memset(¤t, 0, sizeof(current));
|
|
|
|
if (enableRawMode(¤t) == -1) {
|
|
printf("%s", prompt);
|
|
fflush(stdout);
|
|
sb = sb_getline(stdin);
|
|
}
|
|
else {
|
|
current.buf = sb_alloc();
|
|
current.pos = 0;
|
|
current.nrows = 1;
|
|
current.prompt = prompt;
|
|
|
|
count = linenoiseEdit(¤t);
|
|
|
|
disableRawMode(¤t);
|
|
printf("\n");
|
|
|
|
sb_free(current.capture);
|
|
if (count == -1) {
|
|
sb_free(current.buf);
|
|
return NULL;
|
|
}
|
|
sb = current.buf;
|
|
}
|
|
return sb ? sb_to_string(sb) : NULL;
|
|
}
|
|
|
|
/* Using a circular buffer is smarter, but a bit more complex to handle. */
|
|
int linenoiseHistoryAddAllocated(char *line) {
|
|
|
|
if (history_max_len == 0) {
|
|
notinserted:
|
|
free(line);
|
|
return 0;
|
|
}
|
|
if (history == NULL) {
|
|
history = (char **)calloc(sizeof(char*), history_max_len);
|
|
}
|
|
|
|
/* do not insert duplicate lines into history */
|
|
if (history_len > 0 && strcmp(line, history[history_len - 1]) == 0) {
|
|
goto notinserted;
|
|
}
|
|
|
|
if (history_len == history_max_len) {
|
|
free(history[0]);
|
|
memmove(history,history+1,sizeof(char*)*(history_max_len-1));
|
|
history_len--;
|
|
}
|
|
history[history_len] = line;
|
|
history_len++;
|
|
return 1;
|
|
}
|
|
|
|
int linenoiseHistoryAdd(const char *line) {
|
|
return linenoiseHistoryAddAllocated(strdup(line));
|
|
}
|
|
|
|
int linenoiseHistoryGetMaxLen(void) {
|
|
return history_max_len;
|
|
}
|
|
|
|
int linenoiseHistorySetMaxLen(int len) {
|
|
char **newHistory;
|
|
|
|
if (len < 1) return 0;
|
|
if (history) {
|
|
int tocopy = history_len;
|
|
|
|
newHistory = (char **)calloc(sizeof(char*), len);
|
|
|
|
/* If we can't copy everything, free the elements we'll not use. */
|
|
if (len < tocopy) {
|
|
int j;
|
|
|
|
for (j = 0; j < tocopy-len; j++) free(history[j]);
|
|
tocopy = len;
|
|
}
|
|
memcpy(newHistory,history+(history_len-tocopy), sizeof(char*)*tocopy);
|
|
free(history);
|
|
history = newHistory;
|
|
}
|
|
history_max_len = len;
|
|
if (history_len > history_max_len)
|
|
history_len = history_max_len;
|
|
return 1;
|
|
}
|
|
|
|
/* Save the history in the specified file. On success 0 is returned
|
|
* otherwise -1 is returned. */
|
|
int linenoiseHistorySave(const char *filename) {
|
|
FILE *fp = fopen(filename,"w");
|
|
int j;
|
|
|
|
if (fp == NULL) return -1;
|
|
for (j = 0; j < history_len; j++) {
|
|
const char *str = history[j];
|
|
/* Need to encode backslash, nl and cr */
|
|
while (*str) {
|
|
if (*str == '\\') {
|
|
fputs("\\\\", fp);
|
|
}
|
|
else if (*str == '\n') {
|
|
fputs("\\n", fp);
|
|
}
|
|
else if (*str == '\r') {
|
|
fputs("\\r", fp);
|
|
}
|
|
else {
|
|
fputc(*str, fp);
|
|
}
|
|
str++;
|
|
}
|
|
fputc('\n', fp);
|
|
}
|
|
|
|
fclose(fp);
|
|
return 0;
|
|
}
|
|
|
|
/* Load the history from the specified file.
|
|
*
|
|
* If the file does not exist or can't be opened, no operation is performed
|
|
* and -1 is returned.
|
|
* Otherwise 0 is returned.
|
|
*/
|
|
int linenoiseHistoryLoad(const char *filename) {
|
|
FILE *fp = fopen(filename,"r");
|
|
stringbuf *sb;
|
|
|
|
if (fp == NULL) return -1;
|
|
|
|
while ((sb = sb_getline(fp)) != NULL) {
|
|
/* Take the stringbuf and decode backslash escaped values */
|
|
char *buf = sb_to_string(sb);
|
|
char *dest = buf;
|
|
const char *src;
|
|
|
|
for (src = buf; *src; src++) {
|
|
char ch = *src;
|
|
|
|
if (ch == '\\') {
|
|
src++;
|
|
if (*src == 'n') {
|
|
ch = '\n';
|
|
}
|
|
else if (*src == 'r') {
|
|
ch = '\r';
|
|
} else {
|
|
ch = *src;
|
|
}
|
|
}
|
|
*dest++ = ch;
|
|
}
|
|
*dest = 0;
|
|
|
|
linenoiseHistoryAddAllocated(buf);
|
|
}
|
|
fclose(fp);
|
|
return 0;
|
|
}
|
|
|
|
/* Provide access to the history buffer.
|
|
*
|
|
* If 'len' is not NULL, the length is stored in *len.
|
|
*/
|
|
char **linenoiseHistory(int *len) {
|
|
if (len) {
|
|
*len = history_len;
|
|
}
|
|
return history;
|
|
}
|